1. 他知道。 he knows –> 他知道吗? does he know
2. 吃过饭了。 ate meal (who ate?) –> 吃过饭了吗? has ?? had a meal?
3. 他会在家。 he may be home –> 他会在家吗? is he likely to be home?
4. 大家都到了。 everyone has arrived –> 大家都到了吗? has everyone arrived?
5. 我很累 I’m very tired –> 我很累吗? am I very tired?

I’m new to Chinese and just want to say, Thank you very much for sharing and caring 🙂 At first, I looked this interrogative statement and translated the Chinese characters word by word and came up with my own translation:

“How good is your body?”

Is this still right? Though in my context, it’s different. If that make sense?